Actions speak louder than words. He can claim he likes those characters all he wants, but his actual writing never indicates it. His only Bat-Family focused arc was basically hate mail to the concept of the Family. He's never focused on Tim, or Jason, or Damian, or even Dick (aside from Black Mirror 7 years ago) I don't believe he cares about those characters for a second.
His explanation for the Batman doesn't need a Robin, Duke is going to be better than Robin BS is weaker than his character creation skills. I still see Duke as a middle finger to Robin fans, and I don't see any evidence contradicting that.
And he did say "Batman doesn't need a Robin" in ASB #1. You seem to be ignoring that and focusing on the less offensive "Robin doesn't need Batman" line.